:root{--chat-bg-a: #f5f8ff;--chat-bg-b: #eef3fb;--chat-card: #ffffff;--chat-border: #dbe3ef;--chat-text: #0f172a;--chat-muted: #64748b;--chat-primary: #0f172a;--chat-primary-soft: #eef2ff;--chat-accent: #2563eb;--chat-success: #22c55e}.chat-page{padding:26px 16px;display:flex;justify-content:center;background:radial-gradient(900px 260px at 0% 0%,rgba(37,99,235,.1),transparent 65%),linear-gradient(180deg,var(--chat-bg-a),var(--chat-bg-b))}.chat-page :is(button,input,textarea,a){transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease,background-color .15s ease,color .15s ease}.chat-page :is(button,input,textarea,a):focus-visible{outline:2px solid #60a5fa;outline-offset:2px;box-shadow:0 0 0 3px #60a5fa40}.chat-card{width:min(1240px,100%);background:#fffffff5;border:1px solid var(--chat-border);border-radius:20px;padding:22px;box-shadow:0 22px 44px #0f172a14;position:relative}.chat-header{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:16px}.chat-header h2{margin:0 0 6px;font-size:clamp(22px,2.4vw,30px);color:var(--chat-text)}.chat-header p{margin:0;color:var(--chat-muted)}.chat-tabs{display:flex;gap:8px;background:#f8fafc;border:1px solid var(--chat-border);border-radius:12px;padding:6px}.chat-tabs button{width:auto;padding:9px 14px;border-radius:10px;border:1px solid transparent;background:transparent;color:var(--chat-text);font-weight:700;cursor:pointer}.chat-tabs button.active{background:var(--chat-primary);color:#fff;box-shadow:0 8px 18px #0f172a33}.chat-tabs button:hover:not(.active){border-color:#bfdbfe;background:#f1f5f9}.chat-layout{display:grid;grid-template-columns:320px 1fr;gap:16px;align-items:start}.chat-sidebar{display:grid;gap:12px;position:sticky;top:14px;align-self:start}.chat-start{display:grid;gap:8px;background:var(--chat-card);border:1px solid var(--chat-border);border-radius:14px;padding:12px}.chat-start input,.chat-start button{padding:9px 12px;border-radius:10px;border:1px solid var(--chat-border);font-family:inherit}.chat-start input{color:var(--chat-text);background:#fff}.chat-start input:focus-visible{border-color:#93c5fd}.chat-user-list{display:grid;gap:7px;max-height:220px;overflow-y:auto;padding-right:2px}.chat-user-list button{display:flex;justify-content:space-between;gap:8px;padding:9px 10px;border-radius:10px;border:1px solid var(--chat-border);background:#fff;text-align:right;cursor:pointer}.chat-user-list button:hover{border-color:#93c5fd;background:#f8fbff}.chat-user-list button.active{border-color:#2563eb;background:#eff6ff}.chat-user-name{font-weight:800;color:var(--chat-text)}.chat-user-role{font-size:12px;color:var(--chat-muted)}.chat-refresh{background:linear-gradient(135deg,#1e293b,#0f172a);color:#fff;border:1px solid #0f172a;cursor:pointer}.chat-refresh:hover{transform:translateY(-1px);box-shadow:0 10px 18px #0f172a38}.chat-list{display:grid;gap:8px}.chat-list button{border:1px solid var(--chat-border);border-radius:12px;padding:10px;background:#fff;text-align:right;display:grid;gap:4px;cursor:pointer}.chat-list button:hover{border-color:#93c5fd;background:#f8fbff}.chat-list button strong{color:var(--chat-text);font-weight:800;line-height:1.4;white-space:normal;word-break:break-word}.chat-list button span{color:var(--chat-muted);font-size:12px}.chat-user-line{display:flex;align-items:center;gap:8px}.status-dot{width:9px;height:9px;border-radius:50%;background:#cbd5e1}.status-dot.online{background:var(--chat-success);box-shadow:0 0 0 3px #22c55e26}.chat-list button.active{border-color:var(--chat-primary);background:var(--chat-primary-soft)}.chat-main{border:1px solid var(--chat-border);border-radius:16px;padding:14px;display:grid;grid-template-rows:auto 1fr auto;gap:12px;min-height:560px;background:#fff}.chat-title{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 10px;border-radius:12px;background:#f8fafc;border:1px solid var(--chat-border)}.chat-title strong{font-size:16px;color:var(--chat-text)}.presence{font-size:12px;color:var(--chat-muted);font-weight:700}.presence.online{color:#16a34a}.chat-messages{display:grid;gap:10px;align-content:start;max-height:430px;overflow-y:auto;padding-right:4px}.chat-message{border:1px solid var(--chat-border);border-radius:14px;padding:10px 12px;background:#f8fafc}.chat-message.mine{background:linear-gradient(145deg,#e8f4ff,#dcfce7);border-color:#a7f3d0}.chat-message .meta{display:flex;justify-content:space-between;font-size:12px;color:var(--chat-muted);margin-bottom:6px}.chat-message p{margin:0 0 6px;color:var(--chat-text);line-height:1.7}.chat-file img{max-width:260px;border-radius:10px;display:block;margin-top:6px;border:1px solid #cbd5e1}.chat-file a{color:#1d4ed8;text-decoration:none;font-weight:700}.chat-input{position:sticky;bottom:0;background:#fff;padding-top:4px;border-top:1px solid #eef2f7}.chat-input textarea{width:100%;border-radius:12px;border:1px solid var(--chat-border);padding:10px 12px;font-family:inherit;color:var(--chat-text);resize:vertical}.chat-input textarea:focus-visible{border-color:#93c5fd}.chat-input textarea:disabled{background:#f1f5f9;color:var(--chat-muted)}.chat-actions{display:flex;justify-content:space-between;gap:8px;margin-top:8px;align-items:center}.chat-actions button{width:auto;padding:9px 15px;border-radius:10px;border:1px solid #0f172a;background:linear-gradient(135deg,#1e293b,#0f172a);color:#fff;min-width:96px;display:inline-flex;justify-content:center;align-items:center;font-weight:700;cursor:pointer}.chat-actions button:disabled{background:#94a3b8;border-color:#94a3b8;cursor:not-allowed}.chat-actions button:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 10px 18px #0f172a3d}.file-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:10px;border:1px solid var(--chat-border);background:#fff;color:var(--chat-text);cursor:pointer;font-weight:700}.file-btn.disabled{opacity:.7;cursor:not-allowed}.file-btn:hover:not(.disabled){border-color:#93c5fd;background:#f8fbff}.file-btn input{display:none}.chat-typing{font-size:12px;color:var(--chat-muted);padding:6px 10px;background:#f8fafc;border:1px solid var(--chat-border);border-radius:10px}.chat-toast{position:absolute;top:12px;left:16px;background:#0f172a;color:#fff;padding:8px 12px;border-radius:10px;font-size:12px;box-shadow:0 10px 20px #0f172a33;z-index:10}.chat-preview{margin-top:8px;border:1px dashed var(--chat-border);border-radius:10px;padding:8px;background:#f8fafc}.chat-preview img{max-width:180px;border-radius:8px;border:1px solid #cbd5e1}.chat-preview .file-label{font-size:12px;color:#475569}.chat-empty{padding:14px;border-radius:12px;background:#f8fafc;color:#64748b;border:1px solid var(--chat-border)}.chat-sync-badge{display:inline-flex;align-items:center;justify-content:center;padding:6px 10px;border-radius:999px;font-size:12px;font-weight:800;border:1px solid var(--chat-border);color:var(--chat-muted);background:#fff}.chat-sync-badge.live{color:#166534;border-color:#22c55e40;background:#22c55e1f}.chat-sync-badge.pending{color:#9a3412;border-color:#fb923c47;background:#fb923c24}.chat-sync-badge.danger{color:#b91c1c;border-color:#f8717147;background:#f8717124}.chat-sync-badge.muted{color:#475569;background:#f8fafc}.virtual-layout{display:grid;grid-template-columns:360px 1fr;gap:16px;align-items:start}.virtual-sidebar{display:grid;gap:12px;position:sticky;top:14px;align-self:start}.virtual-summary-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.virtual-summary-card{border:1px solid var(--chat-border);border-radius:14px;padding:14px;background:#fff;display:grid;gap:8px}.virtual-summary-card span{color:var(--chat-muted);font-size:12px}.virtual-summary-card strong{color:var(--chat-text);font-size:22px;line-height:1}.virtual-summary-card.live{background:linear-gradient(145deg,#22c55e1f,#10b98114);border-color:#10b98140}.virtual-summary-card.ended{background:linear-gradient(145deg,#94a3b829,#e2e8f066)}.virtual-toolbar,.chat-session-form{border:1px solid var(--chat-border);border-radius:16px;background:#fff;padding:14px;display:grid;gap:12px}.virtual-toolbar label,.chat-session-grid label{display:grid;gap:6px;font-size:13px;font-weight:800;color:var(--chat-text)}.virtual-toolbar select,.chat-session-grid :is(input,select,textarea){border:1px solid var(--chat-border);border-radius:10px;padding:9px 12px;background:#fff;color:var(--chat-text);font-family:inherit}.virtual-toolbar select:focus-visible,.chat-session-grid :is(input,select,textarea):focus-visible{border-color:#93c5fd}.virtual-toolbar-actions,.chat-session-actions,.virtual-session-actions{display:flex;flex-wrap:wrap;gap:8px}.virtual-link-btn,.ghost-btn,.danger-btn,.chat-session-actions button{width:auto;text-decoration:none;padding:9px 14px;border-radius:10px;font-weight:800;border:1px solid var(--chat-border);background:#fff;color:var(--chat-text);cursor:pointer}.virtual-link-btn:hover,.ghost-btn:hover,.danger-btn:hover,.chat-session-actions button:hover{transform:translateY(-1px);box-shadow:0 10px 18px #0f172a1f}.virtual-link-btn,.chat-session-actions button{background:linear-gradient(135deg,#1e293b,#0f172a);border-color:#0f172a;color:#fff}.danger-btn{border-color:#ef44444d;color:#b91c1c;background:#fef2f2e6}.section-head{display:flex;justify-content:space-between;gap:12px;align-items:start;flex-wrap:wrap}.section-head h3{margin:0 0 4px;color:var(--chat-text);font-size:18px}.section-head p{margin:0;color:var(--chat-muted);font-size:13px;line-height:1.7}.chat-session-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.chat-session-grid .full{grid-column:1 / -1}.virtual-main{border:1px solid var(--chat-border);border-radius:16px;background:#fff;padding:16px;min-height:560px}.virtual-session-list{display:grid;gap:14px}.virtual-session-card{border:1px solid var(--chat-border);border-radius:16px;background:linear-gradient(180deg,#fff,#fbfdff);padding:16px;display:grid;gap:12px}.virtual-session-head{display:flex;justify-content:space-between;gap:12px;align-items:start;flex-wrap:wrap}.virtual-session-head h3{margin:0 0 4px;color:var(--chat-text)}.virtual-session-head p,.virtual-session-description{margin:0;color:var(--chat-muted);line-height:1.8}.virtual-session-meta{display:flex;flex-wrap:wrap;gap:8px 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